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| CAS No.: | 6126-22-3 |
|---|---|
| Name: | 3-Amino-5-hydroxypyrazole |
| Article Data: | 8 |
| Molecular Structure: | |
|
|
|
| Formula: | C3H5N3O |
| Molecular Weight: | 99.0922 |
| Synonyms: | 3-Pyrazolidinone, 5-imino- (7CI);3-Amino-2-pyrazolin-5-one;3-Aminopyrazolone;NSC 30480;NSC 34806;NSC 50565;2-Pyrazolin-5-one,3-amino- (6CI,8CI); |
| EINECS: | 228-095-6 |
| Density: | 1.79 g/cm3 |
| Melting Point: | 214 °C (dec.)(lit.) |
| Boiling Point: | 185.55°C (rough estimate) |
| Appearance: | yellow-beige to beige-brown crystalline powder |
| Hazard Symbols: |
 Xi
|
| Risk Codes: | 36/37/38 |
| Safety: | 26-37/39 |
| PSA: | 74.93000 |
| LogP: | 0.27870 |
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- 914458-26-7[5-(2-fluorophenyl)-1-pentyl-1H-pyrrol-3-yl]-1-naphthalenyl-Methanone
- 894852-01-87-BROMO-2,2-DIMETHYL-2H-PYRIDO[3,2-B][1,4]OXAZIN-3(4H)-ONE
| Conditions | Yield |
|---|---|
| With potassium hydroxide In methanol for 2h; Reflux; | 95% |
| With sodium methylate In methanol for 2h; Heating; | 80% |
| With sodium In methanol for 2h; Heating; | 80% |
| Conditions | Yield |
|---|---|
| With hydrazine hydrate at 80℃; for 0.0833333h; Microwave irradiation; Green chemistry; | 82% |
| Conditions | Yield |
|---|---|
| With hydrazine hydrate; triethylamine In ethanol for 6h; Reflux; | 82% |
- 67449-75-6, 23973-22-0
ethyl (E)-2-cyano-3-(2-furyl)-2-propenoate
- 6126-22-3
3-amino-2-pyrazolin-5-one
| Conditions | Yield |
|---|---|
| With piperidine In ethanol for 3h; Heating; | 90% |
- 13450-77-6
4-chlorohippuric acid
- 108-24-7
acetic anhydride
- 122-51-0
orthoformic acid triethyl ester
- 6126-22-3
3-amino-2-pyrazolin-5-one
| Conditions | Yield |
|---|---|
| Heating; | 90% |
| Conditions | Yield |
|---|---|
| With triethylamine In tetrahydrofuran for 5h; | 86% |
- 57031-90-0
ethyl (Z)-3-hydroxy-2-butenoate
- 6126-22-3
3-amino-2-pyrazolin-5-one
| Conditions | Yield |
|---|---|
| In acetic acid for 0.5h; Ambient temperature; | 85.8% |
| Conditions | Yield |
|---|---|
| With acetic acid In ethanol for 3h; Reflux; | 85% |
| Conditions | Yield |
|---|---|
| With piperidine In ethanol for 3h; Heating; | 82% |
- 6126-22-3
3-amino-2-pyrazolin-5-one
- 18440-58-9
1-(N-phenylhydrazono)-1-chloropropanone
- 93585-28-5
2-Methyl-3-phenylazo-1H-imidazo[1,2-b]pyrazol-6-one
| Conditions | Yield |
|---|---|
| With triethylamine In ethanol for 3h; Heating; | 82% |
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Chemistry
Molecular structure of 3-Amino-5-hydroxypyrazole (CAS NO.6126-22-3) is:
Product Name: 3-Amino-5-hydroxypyrazole
CAS Registry Number: 6126-22-3
IUPAC Name: 3-amino-1,4-dihydropyrazol-5-one
Molecular Weight: 99.0913 [g/mol]
Molecular Formula: C3H5N3O
XLogP3-AA: -1.4
H-Bond Donor: 2
H-Bond Acceptor: 3
EINECS: 228-095-6
Melting Point: 214 °C (dec.)(lit.)
Surface Tension: 84.5 dyne/cm
Density: 1.79 g/cm3
Product Categories: Imidazoles, Pyrroles, Pyrazoles, Pyrrolidines;Amines;Pyrazoles & Triazoles;Pyrazoles & Triazoles;Building Blocks;Heterocyclic Building Blocks;Pyrazoles
Safety Profile
Safty information about 3-Amino-5-hydroxypyrazole (CAS NO.6126-22-3) is:
Hazard Codes: 
Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S37/39:Wear suitable gloves and eye/face protection.
WGK Germany: 3
Specification
3-Amino-5-hydroxypyrazole , its cas register number is 6126-22-3. It also can be called 3-Amino-1H-pyrazol-5-ol ; 3-Amino-2-pyrazolin-5-one ; 5-Amino-2,3-dihydro-1H-pyrazol-3-one .It is a yellow-beige to beige-brown crystalline powder.